O2 Sensor Open/Close Loop
kleenair at ix.netcom.com
kleenair at ix.netcom.com
Wed Nov 13 19:35:50 GMT 1996
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Here is some data that shows newer vehicles stay in closed loop at WOT.
The vehicle tested is a 1997 GMC 2500 P/U with a 5700 Vortec V-8. I
logged MAP, RPM, TPS (0= closed, 400= WOT), and O2 volts. You can see
the sensor voltage toggles all the way through WOT points.
If this works out the way I think, the message should have an attached
file with the data.
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"Rec","Sec","Cnt","Key" , "MAP", "RPM", "O2VOLT", "tpsindex"
" "," "," "," " , "Avg" , "Avg" , "Avg" , "Avg"
1, 0.00, 1, " " , 14.73, 1683.28, 0.58, 39.00
2, 0.22, 1, " " , 14.76, 1683.28, 0.76, 39.00
3, 0.38, 1, " " , 14.76, 1677.42, 0.40, 39.00
4, 0.60, 1, " " , 14.79, 1683.28, 0.26, 39.00
5, 0.77, 1, " " , 14.79, 1683.28, 0.31, 39.00
6, 0.99, 1, " " , 14.79, 1677.42, 0.36, 39.00
7, 1.15, 1, " " , 14.79, 1683.28, 0.69, 37.00
8, 1.37, 1, " " , 14.82, 1689.15, 0.61, 41.00
9, 1.54, 1, " " , 14.94, 1689.15, 0.73, 58.00
10, 1.76, 1, " " , 16.39, 1736.07, 0.11, 67.00
11, 1.92, 1, " " , 17.24, 1765.40, 0.65, 71.00
12, 2.03, 1, " " , 17.48, 1824.05, 0.29, 73.00
13, 2.20, 1, " " , 17.67, 1853.37, 0.75, 71.00
14, 2.36, 1, " " , 17.67, 1888.56, 0.66, 80.00
15, 2.53, 1, " " , 17.82, 1923.75, 0.41, 85.00
16, 2.69, 1, " " , 18.42, 1976.54, 0.16, 87.00
17, 2.86, 1, " " , 18.76, 2005.87, 0.83, 88.00
18, 3.02, 1, " " , 18.67, 2046.92, 0.10, 92.00
19, 3.19, 1, " " , 18.82, 2082.11, 0.64, 94.00
20, 3.41, 1, " " , 19.09, 2123.17, 0.57, 96.00
21, 3.57, 1, " " , 19.06, 2152.49, 0.11, 100.00
22, 3.79, 1, " " , 19.33, 2187.68, 0.66, 104.00
23, 4.01, 1, " " , 19.70, 2234.60, 0.62, 115.00
24, 4.23, 1, " " , 20.97, 2293.26, 0.81, 125.00
25, 4.40, 1, " " , 21.97, 2381.23, 0.75, 129.00
26, 4.62, 1, " " , 22.12, 2439.88, 0.68, 133.00
27, 4.78, 1, " " , 22.42, 2498.53, 0.10, 140.00
28, 5.00, 1, " " , 23.00, 2568.92, 0.77, 142.00
29, 5.22, 1, " " , 23.15, 2627.57, 0.75, 143.00
30, 5.44, 1, " " , 23.12, 2668.62, 0.80, 144.00
31, 5.71, 1, " " , 22.97, 2697.95, 0.77, 144.00
32, 5.93, 1, " " , 22.91, 2721.41, 0.58, 144.00
33, 6.21, 1, " " , 22.82, 2733.14, 0.33, 144.00
34, 6.48, 1, " " , 22.85, 2744.87, 0.12, 148.00
35, 6.70, 1, " " , 23.24, 2762.46, 0.29, 169.00
36, 7.03, 1, " " , 25.21, 2826.98, 0.81, 189.00
37, 7.31, 1, " " , 26.42, 2909.09, 0.09, 197.00
38, 7.64, 1, " " , 26.61, 2967.74, 0.70, 198.00
39, 7.91, 1, " " , 26.55, 3014.66, 0.50, 227.00
40, 8.19, 1, " " , 27.52, 3073.31, 0.10, 269.00
41, 8.52, 1, " " , 28.27, 3137.83, 0.76, 329.00
42, 8.79, 1, " " , 28.67, 3208.21, 0.10, 392.00
43, 9.07, 1, " " , 28.79, 3249.27, 0.78, 392.00
44, 9.34, 1, " " , 28.82, 3137.83, 0.09, 393.00 WOT
45, 9.56, 1, " " , 28.88, 3020.53, 0.65, 393.00
46, 9.78, 1, " " , 28.88, 3008.80, 0.82, 393.00
47, 10.00, 1, " " , 28.88, 3002.93, 0.84, 393.00
48, 10.27, 1, " " , 28.88, 2997.07, 0.32, 393.00
49, 10.49, 1, " " , 28.91, 3002.93, 0.61, 393.00
50, 10.71, 1, " " , 28.91, 3002.93, 0.27, 393.00
51, 10.99, 1, " " , 28.88, 2997.07, 0.15, 393.00
52, 11.21, 1, " " , 28.88, 2985.34, 0.68, 393.00
53, 11.54, 1, " " , 28.91, 2991.20, 0.09, 393.00
54, 11.76, 1, " " , 28.91, 2979.47, 0.80, 393.00
55, 12.03, 1, " " , 28.91, 2979.47, 0.13, 393.00
56, 12.31, 1, " " , 28.88, 2979.47, 0.10, 393.00
57, 12.58, 1, " " , 28.88, 2985.34, 0.31, 393.00
58, 12.86, 1, " " , 28.91, 2979.47, 0.67, 393.00
59, 13.13, 1, " " , 28.91, 2973.61, 0.18, 394.00
60, 13.41, 1, " " , 28.91, 2979.47, 0.08, 394.00
61, 13.63, 1, " " , 28.91, 2979.47, 0.10, 394.00
62, 13.90, 1, " " , 28.91, 2985.34, 0.48, 393.00
63, 14.18, 1, " " , 28.91, 2979.47, 0.14, 393.00
64, 14.45, 1, " " , 28.91, 2985.34, 0.63, 393.00
65, 14.73, 1, " " , 28.88, 2985.34, 0.10, 394.00
66, 15.00, 1, " " , 28.91, 2985.34, 0.29, 394.00
67, 15.27, 1, " " , 28.91, 2997.07, 0.10, 393.00
68, 15.49, 1, " " , 28.91, 2985.34, 0.14, 394.00
69, 15.77, 1, " " , 28.91, 2973.61, 0.68, 393.00
70, 16.04, 1, " " , 28.91, 2973.61, 0.65, 393.00
71, 16.32, 1, " " , 28.91, 2973.61, 0.66, 392.00
72, 16.59, 1, " " , 28.91, 2973.61, 0.11, 391.00
73, 16.87, 1, " " , 28.91, 2979.47, 0.51, 308.00
74, 17.14, 1, " " , 28.67, 2973.61, 0.12, 226.00
75, 17.42, 1, " " , 27.55, 2938.42, 0.71, 182.00
76, 17.69, 1, " " , 25.76, 2873.90, 0.41, 161.00
77, 17.97, 1, " " , 24.55, 2785.92, 0.12, 135.00
78, 18.19, 1, " " , 22.03, 2686.22, 0.10, 119.00
79, 18.41, 1, " " , 20.39, 2563.05, 0.76, 94.00
80, 18.63, 1, " " , 17.82, 2410.56, 0.12, 79.00
81, 18.85, 1, " " , 16.27, 2263.93, 0.73, 53.00
82, 19.01, 1, " " , 15.30, 2093.84, 0.25, 27.00
83, 19.18, 1, " " , 13.39, 1970.67, 0.89, 16.00
84, 19.34, 1, " " , 12.00, 1824.05, 0.88, 7.00
85, 19.51, 1, " " , 10.85, 1736.07, 0.84, 0.00
86, 19.67, 1, " " , 9.27, 1595.31, 0.79, 0.00
87, 19.84, 1, " " , 8.97, 1478.01, 0.19, 0.00
88, 20.00, 1, " " , 8.52, 1384.16, 0.17, 0.00
89, 20.11, 1, " " , 8.36, 1237.54, 0.61, 0.00
90, 20.27, 1, " " , 8.03, 1143.70, 0.75, 0.00
91, 20.44, 1, " " , 7.97, 1032.26, 0.73, 0.00
92, 20.60, 1, " " , 7.97, 920.82, 0.73, 0.00
93, 20.71, 1, " " , 8.15, 856.31, 0.74, 0.00
94, 20.82, 1, " " , 8.30, 797.65, 0.74, 0.00
95, 20.99, 1, " " , 8.55, 739.00, 0.74, 0.00
96, 21.10, 1, " " , 8.88, 692.08, 0.78, 0.00
97, 21.26, 1, " " , 9.30, 645.16, 0.78, 0.00
98, 21.37, 1, " " , 9.88, 621.70, 0.78, 0.00
99, 21.48, 1, " " , 10.18, 609.97, 0.86, 0.00
100, 21.59, 1, " " , 10.48, 604.11, 0.87, 0.00
101, 21.76, 1, " " , 10.48, 604.11, 0.87, 0.00
102, 21.87, 1, " " , 10.64, 604.11, 0.87, 0.00
103, 21.98, 1, " " , 10.79, 621.70, 0.87, 0.00
104, 22.09, 1, " " , 10.79, 621.70, 0.86, 0.00
105, 22.20, 1, " " , 10.79, 621.70, 0.83, 0.00
106, 22.36, 1, " " , 10.79, 627.57, 0.83, 0.00
107, 22.47, 1, " " , 10.76, 627.57, 0.77, 0.00
108, 22.58, 1, " " , 10.76, 621.70, 0.57, 0.00
109, 22.69, 1, " " , 10.76, 621.70, 0.57, 6.00
110, 22.80, 1, " " , 11.06, 639.30, 0.15, 7.00
111, 22.97, 1, " " , 11.45, 656.89, 0.10, 20.00
112, 23.08, 1, " " , 12.91, 721.41, 0.10, 71.00
113, 23.24, 1, " " , 18.45, 821.11, 0.10, 95.00
114, 23.41, 1, " " , 24.79, 997.07, 0.10, 95.00
115, 23.57, 1, " " , 23.82, 1431.09, 0.05, 95.00
116, 23.74, 1, " " , 21.18, 1736.07, 0.87, 115.00
117, 23.96, 1, " " , 21.82, 1982.40, 0.07, 143.00
118, 24.18, 1, " " , 24.45, 2428.15, 0.85, 143.00
119, 24.45, 1, " " , 22.70, 2856.31, 0.17, 144.00
120, 24.78, 1, " " , 21.21, 3261.00, 0.77, 145.00
121, 25.05, 1, " " , 20.67, 3061.58, 0.75, 139.00
122, 25.27, 1, " " , 22.06, 2727.27, 0.68, 141.00
123, 25.55, 1, " " , 22.45, 2744.87, 0.43, 141.00
124, 25.82, 1, " " , 22.39, 2762.46, 0.36, 137.00
125, 26.04, 1, " " , 21.88, 2739.00, 0.13, 139.00
126, 26.32, 1, " " , 22.24, 2744.87, 0.77, 135.00
127, 26.54, 1, " " , 21.88, 2727.27, 0.76, 132.00
128, 26.81, 1, " " , 21.45, 2686.22, 0.43, 137.00
129, 27.03, 1, " " , 22.12, 2692.08, 0.69, 122.00
130, 27.25, 1, " " , 19.97, 2662.76, 0.83, 110.00
131, 27.53, 1, " " , 18.82, 2557.18, 0.24, 108.00
132, 27.69, 1, " " , 18.73, 2504.40, 0.10, 107.00
133, 27.91, 1, " " , 18.85, 2469.21, 0.82, 109.00
134, 28.08, 1, " " , 19.00, 2422.29, 0.09, 121.00
135, 28.30, 1, " " , 21.00, 2445.75, 0.09, 153.00
136, 28.52, 1, " " , 24.52, 2574.78, 0.80, 153.00
137, 28.74, 1, " " , 24.24, 2656.89, 0.82, 152.00
138, 29.01, 1, " " , 24.03, 2715.54, 0.61, 152.00
139, 29.23, 1, " " , 23.64, 2762.46, 0.18, 139.00
140, 29.51, 1, " " , 22.27, 2750.73, 0.09, 162.00
141, 29.78, 1, " " , 24.88, 2815.25, 0.09, 233.00
142, 30.11, 1, " " , 27.88, 2956.01, 0.53, 256.00
143, 30.38, 1, " " , 28.21, 3055.72, 0.73, 298.00
144, 30.66, 1, " " , 28.52, 3143.70, 0.74, 303.00
145, 30.99, 1, " " , 28.48, 3202.35, 0.77, 312.00
146, 31.32, 1, " " , 28.55, 3255.13, 0.30, 365.00
147, 31.59, 1, " " , 28.73, 3278.59, 0.24, 393.00
148, 31.87, 1, " " , 28.82, 3102.64, 0.65, 393.00
149, 32.09, 1, " " , 28.88, 3026.39, 0.61, 394.00
150, 32.31, 1, " " , 28.88, 3014.66, 0.25, 393.00
151, 32.53, 1, " " , 28.88, 3002.93, 0.67, 394.00
152, 32.80, 1, " " , 28.88, 3002.93, 0.12, 394.00
153, 33.02, 1, " " , 28.91, 2997.07, 0.37, 394.00
154, 33.30, 1, " " , 28.91, 2985.34, 0.17, 394.00
155, 33.57, 1, " " , 28.91, 2985.34, 0.68, 395.00
156, 33.85, 1, " " , 28.91, 2979.47, 0.10, 394.00
157, 34.07, 1, " " , 28.91, 2973.61, 0.38, 394.00
158, 34.34, 1, " " , 28.91, 2973.61, 0.77, 396.00
159, 34.62, 1, " " , 28.91, 2967.74, 0.17, 394.00
160, 34.89, 1, " " , 28.94, 2967.74, 0.38, 395.00
161, 35.16, 1, " " , 28.91, 2961.88, 0.35, 394.00
162, 35.38, 1, " " , 28.91, 2967.74, 0.68, 393.00
163, 35.66, 1, " " , 28.91, 2967.74, 0.72, 338.00
164, 35.93, 1, " " , 28.79, 2967.74, 0.37, 213.00
165, 36.21, 1, " " , 25.58, 2885.63, 0.82, 117.00
166, 36.48, 1, " " , 18.85, 2692.08, 0.40, 92.00
167, 36.70, 1, " " , 16.55, 2504.40, 0.60, 59.00
168, 36.87, 1, " " , 14.48, 2252.20, 0.71, 0.00
169, 37.03, 1, " " , 9.76, 2029.33, 0.89, 0.00
170, 37.20, 1, " " , 8.85, 1853.37, 0.89, 0.00
171, 37.36, 1, " " , 8.76, 1618.77, 0.84, 0.00
172, 37.53, 1, " " , 8.91, 1466.28, 0.83, 0.00
173, 37.64, 1, " " , 8.97, 1372.43, 0.82, 0.00
174, 37.80, 1, " " , 8.94, 1325.51, 0.83, 0.00
175, 37.91, 1, " " , 8.61, 1284.46, 0.81, 0.00
176, 38.08, 1, " " , 8.21, 1149.56, 0.81, 0.00
177, 38.19, 1, " " , 7.94, 1073.31, 0.66, 0.00
178, 38.41, 1, " " , 7.94, 956.01, 0.66, 0.00
179, 38.52, 1, " " , 8.00, 856.31, 0.18, 0.00
180, 38.68, 1, " " , 8.27, 797.65, 0.41, 0.00
181, 38.79, 1, " " , 8.52, 709.68, 0.72, 0.00
182, 38.90, 1, " " , 8.88, 680.35, 0.72, 0.00
183, 39.07, 1, " " , 9.45, 639.30, 0.81, 0.00
184, 39.18, 1, " " , 9.76, 621.70, 0.84, 0.00
185, 39.29, 1, " " , 10.06, 609.97, 0.84, 0.00
186, 39.40, 1, " " , 10.39, 598.24, 0.84, 0.00
187, 39.56, 1, " " , 10.70, 604.11, 0.84, 0.00
188, 39.67, 1, " " , 10.70, 604.11, 0.83, 1.00
189, 39.78, 1, " " , 10.79, 609.97, 0.82, 0.00
190, 39.89, 1, " " , 10.79, 609.97, 0.82, 0.00
191, 40.00, 1, " " , 10.82, 615.84, 0.79, 0.00
192, 40.16, 1, " " , 10.79, 621.70, 0.79, 0.00
193, 40.27, 1, " " , 10.79, 621.70, 0.70, 0.00
194, 40.38, 1, " " , 10.76, 621.70, 0.35, 0.00
195, 40.49, 1, " " , 10.85, 639.30, 0.35, 0.00
196, 40.66, 1, " " , 10.88, 656.89, 0.12, 0.00
197, 40.77, 1, " " , 10.76, 692.08, 0.32, 0.00
198, 40.93, 1, " " , 10.76, 692.08, 0.77, 0.00
199, 41.04, 1, " " , 10.30, 721.41, 0.77, 0.00
200, 41.21, 1, " " , 10.30, 739.00, 0.76, 0.00
201, 41.32, 1, " " , 10.03, 739.00, 0.55, 0.00
202, 41.43, 1, " " , 9.85, 733.14, 0.11, 0.00
203, 41.59, 1, " " , 9.55, 739.00, 0.09, 0.00
204, 41.70, 1, " " , 9.36, 739.00, 0.09, 0.00
205, 41.87, 1, " " , 9.21, 733.14, 0.09, 0.00
206, 41.98, 1, " " , 9.21, 733.14, 0.09, 0.00
207, 42.09, 1, " " , 9.21, 733.14, 0.09, 0.00
208, 42.20, 1, " " , 9.21, 733.14, 0.09, 0.00
209, 42.31, 1, " " , 9.21, 733.14, 0.09, 0.00
210, 43.46, 1, " " , 9.21, 733.14, 0.09, 0.00
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